.../cc82/doraemonpaul/yahoo_knowledge/series/specialsequence9.jpg 參考資料： my wisdom of maths
.../cc82/doraemonpaul/yahoo_knowledge/probability/probability9.jpg 參考資料： my wisdom of maths
...mathworld.wolfram.com/Multiple-AngleFormulas.html#eqn38 + my wisdom of maths
..._equation#Solving_non-homogeneous_recurrence_relations + my wisdom of maths
.../cc82/doraemonpaul/yahoo_knowledge/integral/definiteintegral29.jpg 參考資料： my wisdom of maths + http://en.wikipedia.org/wiki/Laguerre_polynomials...
.../cc82/doraemonpaul/yahooknowledge/trianglewave/trianglewave9.jpg 參考資料： my wisdom of maths + http://www.wolframalpha.com/input/?i=arccos+cos+x + formula from...
...formula from http://en.wikipedia.org/wiki/Taylor_series#Examples + my wisdom of maths